[SOLVED] Add an alias file

Hello,

I have installed Zimbra Release 6.0.1_GA_1816.DEBIAN5_64 DEBIAN5_64 FOSS edition. I need to add an extra alias file to the postfix configuration. I modified the /opt/zimbra/postfix/conf/main.cf file with this:

postmap: warning: /etc/mail/sympa_aliases, line 1: record is in "key: value" format; is this an alias file?

The problem is when I send a mail to sympa@ivie.es, that is the domain of this server, or sympa@estafeta1.ivie.es, that is the server's name, I receive an automatic response message that says that the user doesn't exist.